Imagine That Rubin Has Had a Dream Since Childhood of Competing

Imagine that Rubin has had a dream since childhood of competing in the Tour de France,an annual bicycle race.In an attempt to ride in the Tour,he spends hours working out with weights and cycling.Indeed,he works at training until he loses all enjoyment of cycling and continues merely out of inertia.Which of the following seems to be the MOST likely Kantian interpretation of Rubin's actions?

A) He can will that everyone fulfill childhood dreams,and is thus ethically right.
B) He cannot will that everyone ride the Tour,so this is morally wrong.
C) He is treating himself as an autonomous agent,and thus it is morally right.
D) He is treating himself merely as a means to an end,and thus it is unethical.